9
3700LP Bench Scale Series User’s Manual
Maintenance
There is little to do to maintain this scale.
• Keep the platter clean
• Regularly check calibration with a test weight
• Do not use water on the base. A cloth dampened with cleaner is
sufficient for wiping the surface.
Battery Information
The battery powered units must be charged prior to use. Plug in the AC cord
to charge an installed battery. A drained battery will charge in about six
hours.
With approximately one hour of use left in the battery, the display will flash
LOBAT every 15 seconds.
There are three types of RS-232 output protocol:
Type of Protocol
Displayed as
1. Standard ProBench
NCI (Default)
2. NCI Model 3835
3835
3. Model 8213
8213
See
RS-232 Protocol Tables
, with accompanying legend and notes, for
protocol code.
The default baud rate is 9600, 8 data bits, no parity.
Legend:
The following symbols are used in protocol tables.
p ............................. Polarity of weight
“-” for negative
“ ” (space character for positive)
[CR] ........................ ASCII carriage return
[LF] ......................... ASCII line feed
[ETX] ...................... ASCII end of text
[HL] ......................... H = high scale status byte. L = low scale status byte.
[STATUS] ............... Toledo scale status byte
[CONFIDENCE] ...... Toledo confidence test status byte
The serial data format is
- 1 Start bit
- 7 Data bits (8 with no parity)
- 1 Parity bit
- 1 Stop bit
Computer commands and scale
responses are upper and
lowercase character strings.
- (CR) is an ASCII carriage
return
- (LF) is an ASCII line feed
- (ETX) is an ASCII end of text
- x is a weight digit (0-9)
RS-232 Protocols
RS-232 Protocol
Tables
