Solartron Mobrey 3595 4C, Руководство пользователя

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IMP Commands 3595 4C User Manual Part Two
1-4
35952350 (CH01/AA)
Other useful command sequences are:
a. RE ; CH n MO 103 ; ME n (For analogue IMP and Universal IMP)
This command resets previous settings, sets channel n to ‘volts dc 2V range’, and tells the IMP to take a
measurement on channel n .
(On an IMP other than the UIMP, channel n can be any channel; on the UIMP, channel n can be any channel
from 1 through 18)
b. RE ; CH n MO 902; ME n (For digital IMP and Universal IMP)
This command resets previous settings, sets channel n to ‘frequency measurement – gate time 1 second’, and
then tells the IMP to take a measurement on channel n .
(On an IMP other than the UIMP, channel n can be any channel; on the UIMP, channel n can be any channel
from 19 or channel 20)
c. SE ; CO ; TR (For any IMP)
This command sets every IMP (all channels) to either ‘volts dc auto-ranging’ (analogue IMP) or ‘digital status’
(digital or switch IMP) and enables measurements, enables continuous measurement scanning, and then starts
the scanning (measuring on all channels). Scans will continue being made until the buffers available are full or
until the
HA (halt) command is issued.
d. Examples ( a. ) and ( b. ) can be extended to setting up every channel on an IMP and begin scanning. To do this,
use CH MO entry in the Command Directory to decide the required function of each channel. Then string
together all the appropriate CH MO commands (one for each channel). As an example, IMP type 1A would
have twenty CH MO commands sent to it in order to configure every channel:
RE ; CH 1 MO 100 ; CH 2 MO 500 ;……; CH 20 MO 310 ; AR ; TR
e. RE ; CH 1 MO 600 ; CH 1 GA n
1
n
2
n
3
n
4
; IN 1 ; ME 1 (For analogue IMP 1B only)
Where: n
1…
n
4
= IEEE 754 floating-point number
n
1
= most significant byte
For a strain gauge factor of, say, 2.25,
First byte n
1
= 01000000
2
equivalent to 64
10
Second byte n
2
= 00010000
2
equivalent to 16
10
Third byte n
3
= 00000000
2
equivalent to 0
Fourth byte n
4
= 00000000
2
equivalent to 0
This command sequence:
•
resets previous settings,
•
sets channel 1 to measure strain using a ½-bridge (4mA) configuration on auto-ranging,
•
uses a strain gauge factor of 2.25 in strain calculations,
•
initialises the strain gauge, and
•
tells the IMP to take a measurement on Channel 1.
A detailed explanation of how to convert the decimal number ‘2.25’ into a binary number in IEEE 754 floating-
point format is given in Chapter 2.