Measurement Computing TempScan/1100 - Manual (Page 21)

TempScan / MultiScan User’s Manual 899493 System Overview 1-7
Calibration
Calibration of cold junction sensor: Software control of calibrated thermocouple using ChartView’s
built-in calibration feature. The automated calibration function is accessed from ChartView’ Device
pull-down menu using “Select Status” and then selecting “Calibration.” Note that calibration is
performed for each card and chassis in the system.
Voltage Calibration: Software control of gain and offset.
Calibration Constants: Chassis constants stored in NV-RAM. Card constants stored in card’s on-board
EEPROM.
Hardware Configuration
The TempScan/1100 or MultiScan/1200 unit is equipped with a high-speed IEEE 488 interface and an
RS-232 interface. Its IEEE 488 interface is useful in laboratory applications and enables real-time transfers
of acquired data to the host computer’s hard drive for inexpensive mass storage.
Its RS-232 interface is ideal in applications that require the placement of instrumentation at remote
distances from the controlling computer, such as process and environmental control.
This unit can be set up with an IEEE 488 or a RS-232 interface configuration, as determined by the DIP
switch accessible from the rear panel. This DIP switch via its nine microswitches select which command
set is to be used – IEEE 488 or RS-232 – and the operating parameters for each.
The table shows the options for its nine microswitches. Additional DIP switch settings are shown in the
following sections.
Rear Panel DIP Switch
Micro- Label Setting Description
switch # IEEE 488 RS-232
1 COMM SELECT 0 IEEE 488 (N/A)
1 (N/A) RS-232
2,3 HANDSHAKE (H/S) 00 No Handshake No Handshake
01 Software Handshake only
(XON/XOFF) (See Note)
Software Handshake only
(XON/XOFF) (See Note)
10 Hardware Handshake only
(RTS/CTS)
Hardware Handshake only
(RTS/CTS)
11 Both Hardware and Software
Handshake
Both Hardware and Software
Handshake
4,5 IEEE ADDRESS or 00 Decimal value 0 No Parity
PARITY 01 Decimal value 8 Odd Parity
10 Decimal value 16 Even Parity
11 Decimal value 24 (N/A)
6,7,8 IEEE ADDRESS or 000 Decimal value 0 300 baud
BAUD RATE 001 Decimal value 1 600 baud
010 Decimal value 2 1200 baud
011 Decimal value 3 2400 baud
100 Decimal value 4 4800 baud
101 Decimal value 5 9600 baud (See Note)
110 Decimal value 6 (N/A)
111 Decimal value 7 (N/A)
9 CHASSIS 0 Disabled Disabled
CALIBRATION
ENABLE
1 Enabled Enabled
Note: (1) XON/XOFF handshaking is valid for ASCII transmissions only. (2) At 9600 baud,
hardware (RTS/CTS) handshaking and possibly software (XON/XOFF) handshaking may be
required to maintain serial performance.