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COUNTER TIMER (AT) - [ Type : CT 541A ]  
Technical Data

Counter Timer (AT) CT 541A manufactured by NUCLEONIX is an advanced technology based unit designed around a eight bit microcontroller chip. This unit is very versatile and can be operated in three modes namely PRESET TIME, CPS & CPM modes.

The user interface is through built-in keypad command buttons START, STOP, PROG, STORE/RECALL, INC & DEC. The visual indication is through LCD dotmatrix display. It has on board memory to store 1000 readings. The stored data readings can be recalled onto display or can be printed on a printer.
This unit has a built-in parallel port (centronics) facilitating direct data printing and a serial port RS 232 for connecting to a PC, for data communication.

The other features include programmability for assigning lables for the readings such as BG - for background, ST - for standard and SP - for sample counting.

It can count both positive and negative pulses in the range of 100 mV to 10V and upto a maximum frequency of 1MHz. LCD display indicates preset time, elapsed time and counts.


  • Microcontrolled based state- of-art counter/timer
  • Modes : Counting for preset time, CPS & CPM
  • Dotmatrix LCD display indication for counts, elapsed time and preset time
  • Store/recall facility for 1000 readings
  • Built-in parallel port for direct data printing
  • Built-in serial port for PC communication
100mV to 10V, unipolar or positive bipolar semi-guassion pulse
Pulse Width
0.5 micro sec (min)
Positive or Negative
Input Impedance
5.0 K ohms
Input Counts Capacity

999999 counts

Input Frequency (max)
1 MHz
Pulse Height Discrimination
100mV - 10V by a preset provided on front panel
Modes of Data Acquisition
a. Counts for a preset time
b. CPS
c. CPM
Counts Indication
8x2 dotmatrix LCD display
Preset Time Setting
Programmable through tactile switch control buttons
Preset Time Range
1 to 9999
User Interface
START, STOP, PROG, STORE, INC & DEC are the six control buttons provided on the instrument. The above buttons allow the user to program & operate the instruments in appropriate manner.
Preset Time/Elapsed Time Indication
On 8x2 LCD Dot matrix display
Additional Options
a. Data communication Software for down loading of data can be given.
b. Printer.
Module connector
Amphenol Connector Type : 26-159-24P-H (24 Pin Type) or NIM Standard as per AEC specifications TID 20893 (Rev) Type : AMP 204186-5
Plot No.162 A & B, Phase-II, IDA, Cherlapally, Hyderabad-500051 India Phone: +91-7207034546, +91-7331104481, 7331104482, Fax : 040 - 29706486.
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