Cooper Instruments & Systems DFI INFINITY Digital Force Indicator/Controller - Manual (Page 74)

11.31 Calibration Items
a) Analog Output. These items are each 2-byte Hex values (4 characters), that are on the back of the isolated
analog output board:
1) CAL VZ (Calibrate Voltage Zero)
2) CAL VS (Calibrate Voltage Span)
3) CALmAZ (Calibrate milliAmp Zero)
4) CALmAS (Calibrate milliAmp Span)
All items use command prefixes R and W, and suffixes are as follows:
CAL VZ=2F
CAL VS=30
CALmAZ=31
CALmAS=32
Legal values for each item can be from 0 to 59999 decimal or from 0 to EA5F HEX.
b) Internal Oscillator Frequency. This is a 1-byte hex value (2 characters) that uses the command prefixes R
and W with the suffix 2E. Units of the value are Hz. This value is added to or subtracted from the original
oscillator frequency, which is 11.059 MHz.
Bits 0 to 6 (the least 7 bits) are assigned to the value.
Bit 7 (the most significant bit) is the sign bit where 0 is a positive value and 1 is a negative value.
The oscillator frequency can be calibrated to ±127 Hz.
EXAMPLE: You want to subtract 15 Hz from the oscillator frequency. Send the command *15W2E8F.
The meter will respond with 15W2E. Reset the meter with the command *15Z05.
11.32 Block Read Or Write
A Block consists of more than one item. The data pattern is the union of all individual byte pattern items
included in that block and its order is exactly as described in corresponding tables below:
1. Block transmit command structure for “P” or “W”;
*[nn]ccc[hh]
2. Block receive structure for “G” or “R”:
*[nn][ccc][hh][LF]
Note 1: Byte No. 1 is the MS byte in block.
Note 2: MS byte of each item is the first to transmitted or received.
Note 3: If the meter is in “No Echo Mode”, [nn][ccc] will be omitted from receive data format.
Note 4: One byte is equal to two ASCII characters.
Note 5: One block length might be different for each different mode or for different command prefixes.
Table 11.26 of Block Command prefixes and suffixes is for Batch Controller, Rate Meter and Square Root
Meters.
Table 11.26. Description of Block Commands
BLOCK COMMAND PREFIX COMMAND SUFFIX (HEX)
A G, P, R, W 40
B G, P, R, W 41
C G, P, R, W 42
D R, W 43
E R, W 44
CF 125 INFINITY SC GUIDE 70 M1519/N/0605