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World Headquarters
621 Hunt Valley Circle
New Kensington, PA 15068 USA
Phone: 724-334-5000 • Fax: 724-334-5001
Toll Free: 1-800-736-4666
114A Georges Street Lower
Dun Laoghaire • Co Dublin • Ireland
Phone: +353 1 284 6388
Fax: +353 1 284 6389
8A. ZERO ADJUSTMENT
MVR-300
Base
Installed
in Double
Gang Box
Cover
in Place
Bezel
in Place
7: OPERATION OVERVIEW
LED Operation
SHIELD WIRE WARNING:
Connect the shield of
Modbus wires to the earth ground of the central
control system (e.g., chassis, ground bus bar, etc.).
Normal mode,
no alarm
Low gas alarm
High gas alarm
Fault
Under range
(perform
zero adjust)
Over range
(remove gas)
Offline (not in
calibration
mode)
Normal/Alarm/Fault/
Special States
Waiting to start
calibration mode
During calibration
Zero calibration
error
Zero Cal Mode
Waiting to start
calibration mode
During calibration
Span calibration
error
Span Cal Mode
Magnetic Switch Functions
5 s
Begin zero
calibration
5 s
Begin span
calibration
5 s
5 s
5 s
5 s
Latched
alarm
Latched
alarm
60 min
60 min
60 min
Clears one or
both latched
alarms
Buzzer Operation
No alarm
Low gas alarm
Muted alarm
High gas alarm
Fault (continuous)
Website: www.MyBacharach.com ● E-mail: [email protected]
8: GENERAL CALIBRATION PROCEDURE
1.
The detector must not be in alarm or fault condition.
2.
Calibration gas must be in balance of air,
not
Nitrogen (N
2
).
3.
Attach the pressure regulator to the calibration gas cylinder.
4.
Fit calibration adapter to the cover plate.
5.
The gas flow should be approximately 0.3 to 1.0 L/min.
6.
If operation is intended to be at higher altitudes, the factory calibration
will result in a reading lower than the reading at sea level (reduced partial
pressure). A new span adjustment is recommended if the altitude or the
ambient pressure is changed. The factory calibration is set to sea level.
7. Connect the tubing to the barbed fitting.
8B. SPAN ADJUSTMENT
WARNING:
Ambient air can be used to zero the
sensor instead of synthetic air only if the area is
known to be free of the target gas or any gas to which
the sensor may be cross-sensitive. In this case, no
cylinder or calibration adapter is needed for the zero
adjustment.
8. Tap and hold ( • ) for >5 seconds. The LED will blink
green-green-red when the detector is ready.
9. Apply synthetic air (or use ambient air per warning above).
10. Tap (
• ) within 30 seconds to confirm start of calibration.
Otherwise the detector will time-out and return to normal
operation.
11. As the process progresses, the LED will blink green-red,
green-red-red, green-red-red-red, etc.
• To abort calibration, tap and hold ( • ) for >5 seconds,
turn off gas flow and remove the calibration adapter.
The detector will return to normal operation.
• If calibration is successful (green LED), skip to step 12.
• If calibration is unsuccessful (orange LED blinks @ 2 Hz),
then tap (
• ) to discard the calibration attempt, and see
User Manual (P/N 6203-9000) for troubleshooting.
12. Turn off gas flow from synthetic air.
13. Replace synthetic air tank with calibration gas tank in
preparation for span adjustment.
9. BUMP TEST
Captive
Screw
Copyright ©
2016 Bacharach, Inc. All Rights Reserved
Remove bezel by inserting a coin into the side slot. Remove the
cover plate by loosening the captive set screw.
CALIBRA
TION GA
S
Flow Meter
Pressure
Regulator
Tubing
Calibration
Adapter
Negative gas
fault (perform
zero adjust)
Test Point
Access
Replaceable
Sensor
Alignment
Ribs (x3)
Recovery from
span calibration
2.0 = 2.0 Hz 2 cy
cles/
sec
ond
FAS
T flash/
chirp
0.5 = 0.5 Hz 0.5 cy
cles/
sec
ond
SL
O
W flash/
chirp
LED Color
6: INSTALLATION (CONTINUED)
Coin Slot for Removing Bezel
Warmup mode
(
≈ 6 minutes)
14. Tap and hold (
•• ) for >5 seconds. The LED will blink
green-green-orange when the detector is ready.
15. Apply span gas in the concentration listed on the cal gas
concentration label (beneath the detector’s cover plate).
This may require the temporary removal of the bezel and
cover plate to see the label.
16. Tap
(
•• )
within 30 seconds to confirm initiation of
the calibration. Otherwise the detector will time-out and
return to normal operation.
17. As the calibration process progresses, the LED will blink
green-orange, green-orange-orange,
green-orange-orange-orange, etc.
• To abort calibration, tap and hold
(
•• ) for >5 seconds
,
turn off gas flow and remove the calibration adapter.
The detector will return to normal operation.
• If calibration is successful, the LED will blink
green-orange-red indicating ‘offline’). Turn off gas flow
and remove the calibration adapter. Afte
r 6 minutes
the detector will return to normal operation.
• If calibration is unsuccessful (orange LED blinks @ 2 Hz),
then tap (
•• ) to discard the calibration attempt, and
see User Manual (P/N 6203-9000) for troubleshooting.
Turn off gas flow and remove the calibration adapter.
Afte
r 6 minutes the detector will return to normal
operation.
1.
Inform building personnel of test so that certain alarms
may be inhibited (e.g., shutdown valves, notification of
authorities, etc.).
2.
Connect adapter and target gas according to instructions in
General Calibration Procedure.
3.
Apply a sufficiently high concentration of target gas to
trigger alarms, but not pure refrigerant or hydrocarbons
(e.g., do not use a butane lighter).
4.
Once the alarm thresholds are exceeded, all designated
gas alarm relays will be activated and the digital outputs
will transmit the corresponding gas concentrations.
5.
Turn off gas flow and remove calibration adapter.
1100-xxxx R410A ####ppm
YYMM#### Cal Gas ####ppm
Direction
Arrows (x2)
for Proper
Mounting
Part Number
Serial Number
Max Range
Calibration Gas
Concentration
Sensor Type
