Non-Routine Calibration - Ametek 2003RP User And Programming Manual

Full Scale Power Measurement Calibration
1. Connect the test equipment to the power source as shown in Figure 6-2.
2. Apply the resistive load (see Table 6-1 for model and load) to the output terminals. Set
the power source to low voltage range.
3. Program the output voltage to a value that produces between 3 and 3.9 amps. Do not
load the output to more than 3.9 amps.
4. Use the SELECT key to select the Power Measurement calibration mode. This mode is
indicated by the PWR LED.
5. Calculate the power by multiplying the external reference current reading (DMM1) with
the external reference voltage reading (DMM2).
6. Use the left control knob to adjust the power measurement reading shown on the right
hand 7 segment LED until it reads as close as possible to the calculated power reading.

6.4 Non-Routine Calibration

The following calibrations are not required on a routine basis:
High Current Measurement Range (Section 6.4.1). After the low current measurement
range, 0 to 4 amps, is calibrated, the high range should be within it‟s specification range. If it
is not, this adjustment must be performed.
Current Limit Adjustment (Section 6.4.2). This calibration is only required if the output
current, while operating in the constant current mode, is not equal to or more than the
programmed value.
Open Sense Adjustment (Section 6.4.3). This adjustment must be made if the output voltage
can‟t be calibrated while operating in the constant current mode. If the output faults, with no-
load, while operating in the Constant Voltage mode, this adjustment must also be made.
All of the non-routine calibration adjustments must be made with the top cover removed.
Refer to Figure 6-3 for the location of the internal adjustments.
6.4.1 High Current Measurement Range Adjustment
Note: If the Current Limit and High Current Measurement Range Adjustments
are both adjusted, the High Current Measurement Range must be
adjusted first.
1. Connect the test equipment as shown in Figure 6-2. Use full load resistance for the low
voltage range.
2. Program the output voltage to 135 V (115 V for –AV option) on the low voltage range and
400 Hz.
3. Use the SELECT key to select the Current Measurement display. Note that this is not
the Current Measurement calibration mode. Only the I RMS LED should be illuminated.
4. Observe the actual output current as shown on external DMM1 and current shunt.
Adjust R6 (Phase A) or R10 (Phase B) or R14 (Phase C) on the Range/Relay board for a
measurement display equal to the actual output current.
CAUTION: The amplifier wind tunnel must be covered for proper cooling if the
adjustment takes more than 1 minute.