Alarm Type Selection
The lower display will either indicate
DBAND
or
ADJ_H
.
If
DBAND
is selected, each relay will operate with 1% of full-
scale deadband between set and reset.
If
ADJ_H
is selected, each output relay will have an adjust-
able set point and an adjustable reset point.
Use the
s
or the
t
buttons to select either
DBAND
or
ADJ_H
.
When to desired mode is displayed, press and release the
SEL
button to move on to the next parameter.
LED Alarm Annunciator Function Selection
This setting lerts the operator to an alarm conditionby blinking
the LEDs. The choices are
Automatically acknowledge:
A_ACK
Manually acknowledge:
M_ACK
No acknowledgement:
NO_AN
Use the
s
or
t
buttons to cycle through the three choices.
A_ACK
: An alarm condition will be automatically acknowl-
edged when the alarm condition clears. When an alarm condi-
tion occurs, the LED for that alarm will begin to blink red until
it has been manually acknowledged by a pressing the
TEST
button, or until the alarm condition no longer exists. If an alarm
is manually acknowledged, the LED will be steadily red while
the alarm condition continues to exist. The LED will be steadily
green whenever no alarm condition exists.
M_ACK
: An alarm condition must be manually acknowledged.
When an alarm condition occurs, the LED for that alarm will
blink red if the alarm condition exists or blink green if the alarm
condition no longer exists. The LED will continue to blink until
it has been manually acknowledged by a pressing the
TEST
button. Once an alarm has been acknowledged, the LED will be
steadily red while the alarm condition exists or green when the
alarm no longer exists.
NO_AN
: The LEDs will not blink. When an alarm condition
occurs, the LED associated with that alarm will be steadily red
if the alarm condition exists, or green if the alarm condition
no longer exists. In addition, the LCD display for ALARM1 and
ALARM2 will not be displayed during alarm conditions.
When the lower display indicates the desired annunciator
action, press and release the
SEL
button to move on to the
next parameter.
Fixed Deadband
DBAND
Alarm Setup
Alarm 1 Type in
DBAND
Mode
If
ADJ_H
was selected, skip to the Relay Power Up State
Section.
Use the
s
or
t
buttons to select either
SP1_L
or
SP1_H
.
If
SP1_L
is selected, Alarm 1 will be a LOW alarm.
Alarm 1 will be SET when the pressure falls below Setpoint 1.
Alarm 1 will be RESET when the pressure rises above Setpoint
1 plus the deadband. The fixed 1% deadband is .01 x the full
scale range of the gauge.
If
SP1_H
is selected Alarm 1 will be a high alarm.
Alarm 1 will be SET when the pressure rises above Setpoint 1.
Alarm 1 will be RESET when the pressure falls below Setpoint
1 minus the deadband. The fixed 1% deadband is .01 x the full
scale range of the gauge.
When the desired alarm type is displayed, press and release the
SEL
button to move to Alarm 2.
Alarm 2 Type in
DBAND
Mode
Use the
s
or
t
buttons to select either
SP2_L
or
SP2_H
.
If
SP2_L
is selected, Alarm 2 will be a LOW alarm.
Alarm 2 will be SET when the pressure falls below Setpoint 1.
Alarm 2 will be RESET when the pressure rises above Setpoint
2 plus the deadband. The fixed 1% deadband is .01 x the full
scale range of the gauge.
If
SP2_H
is selected Alarm 2 will be a high alarm.
Alarm 2 will be SET when the pressure rises above Setpoint 1.
Alarm 2 will be RESET when the pressure falls below Setpoint
2 minus the deadband. The fixed 1% deadband is .01 x the full
scale range of the gauge.
When the desired alarm type is displayed, press and release the
SEL
button to move to the next parameter.
Gauge Configuration
From the normal operating mode, press and hold the
TEST
and
s
buttons.
Then press the
SEL
button.
Release all buttons when the display indicates
CFG
.
Before the gauge enters the Configuration mode, the display
initially indicates _ _ _ _ with the first underscore blinking,
and
CFGPC
on the lower display.
Enter the pass code as described below.
Pass Code Entry
A pass code is required to configure the gauge. Additional levels
of security may be enabled by defining separate pass codes
for calibration, configuration, output test, and set point adjust
modes. See Changing the User-Defined Pass Code at the end of
this manual to change pass codes.
Functions in user configuration mode
Restore original factory configuration
Enable/disable zero tare function
Choosing 1% deadband or adjustable hysteresis alarm mode
Operation for blinking alarm LEDs
Set point modes (high alarm/low alarm or state at power-up)
Relay action mode (normal/reverse)
Enable/disable pass code for output test and set point adjust
When the gauge requests a pass code, the display indicates
____
with the first underscore blinking, and either
TSTPC
,
CFGPC
,
CALPC
on the lower display. All three pass codes
are initially set to the factory default of
3510
.
Note: During pass code entry the LEDs will be off and the gauge
will not respond to changes in pressure. The relays will maintain
their prior state. The gauge will automatically revert to the nor-
mal operation if no buttons are ressed for approx.y 15 seconds.
Use the
s
and
t
buttons to set the left-most digit to 3.
Press and release the
SEL
button to index to the next position.
The 3 will remain, and the second position will be blinking.
Use the
s
and
t
buttons to select 5.
Press and release the
SEL
button to index to the next position. 3
5 will remain, and the third position will be blinking.
Use the
s
and
t
buttons to select 1.
Press and release the
SEL
button to index to the next position. 3
5 1 will remain, and the fourth position will be blinking.
Use the
s
and
t
buttons to select 0.
Press and release the
SEL
button to proceed.
If an incorrect pass code was entered, the gauge will to exit to
the normal operating mode. Upon successful pass code entry,
follow the steps in the appropriate section of this manual.
Note: To exit a mode at any time, press and hold the
SEL
button
until the display indicates – – – – .
Restore Factory Configuration
The upper display will be blank, and the lower display will
display either
USER_
or
FCTRY
.
Use the
s
or
t
buttons to select either
USER_
or
FCTRY
.
If
USER_
is selected, the existing user configuration will be
retained and can be modified in the following steps.
If
FCTRY
is selected, the existing user configuration will be
replaced with the factory configuration. It can be modified in
the following steps.
When the desired setting is displayed, press and release the
SEL
button to move on to the next parameter.
Zero Tare Configuration
The upper display will be blank, and the lower display will
indicate either
ZTARE
or
NOZTR
.
Use the
s
or
t
buttons to select either
ZTARE
or
NOZTR
If
ZTARE
is selected, the user will be able to manually zero
the gauge from the normal operating mode.
If
NOZTR
is selected the user will be prevented from zeroing
the gauge from the normal operating mode. This is default set-
ting for absolute reference ranges.
When the desired setting is displayed, press and release the
SEL
button to move on to the next parameter.
Types of Gauges
Gauge reference models read zero with the gauge port open.
Compound ranges read vacuum in inches of Mercury, pressure
in psig, and zero with the gauge port open.
1000 psi and higher sensors are a sealed-reference type. They
read zero with the gauge port open are internally referenced to
14.7 psi. They function like gauge reference sensors.
Absolute reference gauges read zero at full vacuum and atmo-
spheric pressure with the gauge port open. Note that readings
of atmospheric pressure vary continuously.
Gauge Wiring Diagram
Gauge Power Connections
The 2-conductor cable RED and BLACK leads is for the gauge
power supply. Note the relay cable also has red and black wires.
Do not connect power to them.
Connect to 8-24 VAC, 50/60Hz or 9-32 VDC. The gauge will
operate on either AC or DC power, either polarity. An unregu-
lated power supply can be used. Note that 24 VAC transformers
with small loads may operate at voltages over the 24 VAC limit.
The supply voltage, when within the stated ranges, has negli-
gible effect on the gauge calibration. Operation below 9 VDC
or 8 VAC may cause erratic or erroneous readings or output.
When operating multiple gauges from the same power supply,
refer to the mA rating in the specifications to ensure adequate
power. Route the wires away from heat sources and moving
equipment.
Power Up
The gauge is powered on whenever a supply voltage is applied.
Warm-up time is negligible. The gauge may be left on at all times.
All configuration information is stored in non-volatile memory.
When power is first applied, the gauge proceeds through a
startup sequence. During the startup sequence, relays are de-
energized and the status LEDs are off.
1. The firmware version number is displayed briefly
2. All active display segments are turned on for approx. 1 second.
3. The full scale pressure is indicated for approx. 1 second while
the engineering units and FS (full scale) are indicated for 1/2
second on the character display.
4. The display is tested again for approximately 1 second.
The gauge then proceeds to the normal operating mode.
Alarm Contact Rating and Protection
The alarm contacts are rated at 1A/24VDC or 0.5A/115VAC.
Using mechanical relay contacts above their rating, or with large
inductive loads, will shorten their life. For inductive loads, RC
snubbers or arc suppression devices are required to protect the
contacts. For large loads a higher capacity contactor is required.
No internal fusing is included in the alarm contact circuits. The
alarm outputs should be externally fused by the user in applica-
tions where good design practice dictates.
Alarm Types
The factory default configuration is 1% fixed deadband mode,
zero tare enabled, and no pass code required for test function.
Alarms may be configured to operate in fixed deadband mode
or adjustable hysteresis mode.
In the fixed deadband mode, the alarm set/reset point deadband
is factory set to 1% of full-scale. Each alarm may be configured
as either HI or LO with a user adjustable alarm set point for
each relay.
In the adjustable hysteresis mode, two independent set and
reset trip points are user adjustable for each relay. The set
or reset state at power up when between trip points is user
configurable.
DPG1000ADA Series Digital Pressure Gauges With Alarms
2
Alarm Contact Ratings
0.5A/115VAC,
1A/24VDC,
non-inductive
6-conductor relay wires
BLACK NC Normally Closed
SPDT
1
RED
C Common
NO Normally Open
GREEN
NC Normally Closed
SPDT
2
BROWN
C Common
BLUE
NO Normally Open
Power wires
BLACK
8-24 VAC 50/60 Hz or
9-32 VDC
RED
NC 1
C 1
NO 1
NC 2
C 2
NO 2
DPG1000ADA
