RKI Instruments GD-70D Series - Page 104

GD-70D - 104 -
The warm up time for the MOS sensors depends on how long the sensor was off of power. Sensors are
shipped off of power. The warm up times listed are the minimum times between powering up a GD-70D
and calibrating that GD-70D.
Sensor’s Total
Unpowered Time Before
Startup
Warm Up Time After Power-Up
Hydrogen
Sensors
All Other
Sensors
1 - 10 min
10 min
2 hours
10 minutes - 1 hour
30 min
2 hours
1 - 24 hours
1 hour
4 hours
1 - 3 days
4 hours
24 hours
3 - 10 days
2 days or more
10 – 30 days
7 days or more
1 - 3 months
14 days or more
More than 3 months
1 month or more
Calibration Equipment
• Demand flow regulator (RKI Instruments, Inc. recommends that you do not use a demand flow
regulator that has previously been used for Cl2 or H2S to calibrate a MOS sensor)
• 6” humidifier tube
• Calibration cylinder of appropriate concentration
Preparing for Calibration
GAS IN Fitting
Remove the dust filter and the sample line from the GAS IN fitting’s tubing stub.
Regulator
Screw the demand flow regulator onto the calibration cylinder.
Accessing Maintenance Mode
From Detection Mode, press and hold the MODE key for three seconds.
(For GD-70D-EA units, the Maintenance Mode screen is item 1-9.)
0.0ppm
SIH4
↓
↓
1-8.M MODE
Press the ▲ key until the Maintenance Mode screen displays.
1- 8
M MODE
MAINTENANCE
↓
↓
User Mode
In "1-8.M MODE", press the SET key.
1- 8
M MODE
MAINTENANCE
↓
↓
Then press and hold the SET key again for three seconds.
- - - -
M MODE
MAINTENANCE