18 • 65-2443SS-XX PPM Hydrogen Transmitter
Setting the Span Reading
The configuration of the J3 and J4 jumpers may need to be adjusted during calibration. Valid
configurations for this detector type are: J3 and J4 both installed on both pins or J3 installed on one pin
and J4 installed on both pins. J3 and J4 both installed on one pin is not a valid jumper configuration for
this detector type.
1. Screw the regulator into the full-scale calibration cylinder.
2. Turn the regulator knob counterclockwise to open the regulator.
3. Allow the calibration gas to flow for 2 minutes.
4. Verify a reading of 500 mV (±2 mV) on the voltmeter. If necessary, use the span pot on the
amplifier to adjust the reading.
NOTE:
If you are calibrating a new sensor and the span pot cannot be adjusted high enough to obtain
a reading of 500 mV (±2 mV) on the voltmeter, remove the J3 jumper (see page 7) and try to
adjust the span pot again.
Similarly, if you are calibrating a new sensor and the span pot cannot be adjusted low enough
to obtain a reading of 500 mV (±2 mV) on the voltmeter, install the J3 jumper (see page 7)
and try to adjust the span pot again.
5. Turn the regulator knob clockwise to close the regulator.
6. Unscrew the regulator from the full-scale calibration cylinder.
Setting the Linearization
1. Screw the regulator into the half-scale calibration cylinder.
2. Turn the regulator knob counterclockwise to open the regulator.
3. Allow the calibration gas to flow for 2 minutes.
4. Verify a reading of 300 mV (±2 mV) on the voltmeter. If necessary, use the linear pot on the
amplifier to adjust the reading.
5. Turn the regulator knob clockwise to close the regulator.
6. Unscrew the regulator from the half-scale calibration cylinder.
Returning to Normal Operation
1. Remove the voltmeter leads from the amplifier test points.
2. Unscrew the calibration cup from the detector.
NOTE:
For convenience, leave the regulator and calibration cup connected by the humidifer tube.
3. Secure the junction box cover to the junction box.
4. When the controller display reading falls below the alarm setpoints, return the controller to normal
operation.
5. Verify that the controller display reading decreases and stabilizes at 0 ppm.
6. Store the components of the calibration kit in a safe and convenient place.