Adjustment; Equipment; Adjustment Procedure; Setting Up For Adjustment - Ametek JOFRA DTI050 A Reference Manual

7.2

Adjustment

7.2.1

Equipment

Voltage source –10 mV and 75 mV (15 ppm accuracy).
15 ohm reference resistor (10 ppm accuracy).
100 ohm reference resistor (10 ppm accuracy).
400 ohm reference resistor (10 ppm accuracy).
900 ohm reference resistor (10 ppm accuracy).
1100 ohm reference resistor (10 ppm accuracy).
4000 ohm reference resistor (15 ppm accuracy).
300K ohm reference resistor (40 ppm accuracy).
500K ohm reference resistor (40 ppm accuracy).
7.2.2

Adjustment procedure

The following procedure describes the adjustment of DTI050 by use
of Windows hyperterminal or similar communication software. Allow
15 min warm up time before start of adjustment.

7.2.2.1 Setting up for adjustment

1. Send command "*RST" to reset the unit
2. Send command "P_UPLOAD_OFF" to disable upload of data
from the intelligent sensor/connector.

7.2.2.2 Adjustment 0-78 mV range

1. Connect voltage source to DTI050. Voltage source + terminal are
connected to terminal 3 on DTI050 and voltage source – terminal
are connected to terminal 2 on DTI050.
2. Wait 5 min. for thermal stabilization
3. Send command "FUNC MV".
4. Send command "NUM_CALP 2".
5. Send command "REF[0] –10.000" (Replace 10.000 with actual
value.).
6. Send command "REF[1] 75.000" (Replace 75.000 with actual
value.).
7. Set voltage source to –10mV.
8. Send command "CAL_POINT[0]".
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