PD8-6060 Explosion-Proof Dual Analog Input Process Meter
Instruction Manual
19
Dual Process Inputs
Two Inputs
Two non-isolated inputs, independent, field
selectable: 0-20 mA, 4-20 mA,
10 V (0-5 V,
1-5 V, 0-10 V), Modbus
®
PV (Slave)
Isolated
Transmitter
Power Supply
Terminals P+ & P-: 24 VDC ± 10%.
Isolated from the input at >500 V. Jumper
selectable for 24, 10, or 5 VDC supply
(internal jumper J4). All models transmitter
supply rated @ 25mA max.
on page
Channels
Channel A, Channel B,
Channel C (Math channel)
Programmable
Constants
Constant P (Adder):
-99.999 to 999.999, default: 0.000
Constant F (Factor):
0.001 to 999.999, default: 1.000
Math
Functions
Name
Function
Setting
Addition
(A+B+P)*F
Sunm
Difference
(A-B+P)*F
diF
Absolute diff.
((Abs(A-B))+P)*F
diFAbS
Average
(((A+B)/2)+P)*F
AvG
Multiplication
((A*B)+P)*F
nmulti
Division
((A/B)+P)*F
diVide
Max of A or B
((AB-Hi)+P)*F
Hi-Ab
Min of A or B
((AB-Lo)+P)*F
Lo-Ab
Draw
((A/B)-1)*F
drAuw
Weighted avg. ((B-A)*F)+A
uw avg
Ratio
(A/B)*F
ratio
Ratio 2
((B-A)/A)+P)*F
ratio2
Concentration (A/(A+B))*F
Concen
Note: The F constant can be any value from
0.001 to 999.999. If the value is less than 1,
it will have the same effect as a divider. For
example, the average could also be derived
by using (A+B)*F, where F = 0.500.
Sequence of
Operations
for Input
Programming
1.
Select Input for A and B
2.
Set up the engineering units for
A, B, and C
3.
Set up decimal point for A, B, and C
4.
Program A & B
5.
Set up the displays for A, B, or C
6.
Select the transfer function for A & B
(e.g. Linear)
7.
Select Math function for Channel C
8.
Program constants for Factor (F) and
Adder (P)
9.
Program cutoff values for A and B
Accuracy
±0.03% of calibrated span ±1 count,
square root & programmable exponent
accuracy range: 10-100% of calibrated
span
Temperature
Drift
0.005% of calibrated span/
C max from
0 to 65
C ambient, 0.01% of calibrated
span/
C max from -40 to 0
C ambient
Input Signal
Conditioning
Linear, square root, programmable
exponent, or round horizontal tank volume
calculation
Multi-Point
Linearization
2 to 32 points for channels A and B
Programmable
Exponent
User selectable from 1.0001 to 2.9999 for
open channel flow
Low-Flow
Cutoff
0.1 to 999,999 (0 disables cutoff function).
Point below at which display always shows
zero.
Decimal Point
Up to five decimal places or none:
d.ddddd
,
d.dddd
,
d.ddd
,
d.dd
,
d.d
, or
dddddd
Calibration
Range
Input Range
Minimum Span
Input 1 & 2
4-20 mA
0.15 mA
10 V
0.10 V
An error message will appear if the input 1
and input 2 signals are too close together.
Input
Impedance
Voltage ranges: greater than 500 k
Current ranges: 50 - 100
(depending on
internal resettable fuse impedance)
Input
Overload
Current input protected by an internal
resettable fuse, 30 VDC max. Fuse resets
automatically after fault is removed.
HART
Incompatible
The meter can support ONLY one HART
loop on either of the inputs. A signal
isolator is required if two HART loops are
being connected.
Under the described conditions, the meter
does not interfere with existing HART
communications; it displays the 4-20 mA
primary variable and it allows the HART
communications to pass through without
interruption. The meter is not affected if a
HART communicator is connected to the
loop. The meter does not display
secondary HART variables.
Relays
Rating
4 SPDT (Form C) internal and rated
3 A @ 30 VDC and 125/250 VAC resistive
load; 1/14 HP (
≈
50 W) @ 125/250 VAC for
inductive loads
Noise
Suppression
Noise suppression is recommended for
each relay contact switching inductive
loads. See
for details.
Relay
Assignment
Relays may be assigned to Ch-A, Ch-B,
Ch-C, or Modbus
®
input
Deadband
0-100% of span, user programmable
High or Low
Alarm
User may program any alarm for high or
low trip point. Unused alarm LEDs and
relays may be disabled (turn off).
Relay
Operation
•
Automatic (non-latching) and/or
manual reset
•
Latching (requires manual
acknowledge) with or without clear
•
Pump alternation control (2-4 relays)
•
Sampling (based on set point and time)
•
Off (disable unused relays and enable
Interlock feature)
•
Manual on/off control mode
Relay Reset
(Acknowledge)
User selectable via front panel button, F4
digital input, external contact closure on
digital inputs, or through serial
communications
Time Delay
0 to 999.9 seconds, on & off relay time
delays. Programmable and independent for
each relay
