Auber Instruments JSL-72 Instruction Manual

AUBER INSTRUMENTS WWW.AUBERINS.COM

JSL-72 Instruction Manual

JSL-72 Timer for Coffee Grinder

Version 1.2

1. Overview

This JSL-72 timer is specifically designed for controlling coffee grinder.
It can count from 0.01" to 99.99" or from 1" to 99'59". Counting direction
can be set by user(counting up or counting down). Accumulated time/
cups can be automatically stored in the timer and reset by user.
Operating function modes include single dose, double dose and
manual. Most function features can be activated by front key pad or
remote switch. However, manual function can only be accessed
through remote switch. Three different display modes can be
programmed. User can shift among single/double dose display mode,
total running time display mode, and total number of cups display
mode. Timer adjust function can be deactivated to prevent any
accidental change.

2. Specification

Timer range: 0.01" to 99.99". Or 1" to 99'59"
Timer mode: single dose, double dose, manual
Timer trigger: power on, front key pad, or remote switch
Timer accuracy: <1s/day.
Power supply: 90-260V AC or DC.
Power consumption: <2W
Relay output:7A@240VAC,10@120VAC and 24VDC
Relay life: 100,000 times.
Operating temperature: 0-60 °C.
Humidity: 0-95%RH
Panel cutout: 44.5x44.5mm
Outer dimension: 48x48x85 mm.

5. Down key: When timer is not running, in single/double dose display
mode, press it will lower the time setting value; in total running time/
cups display mode, hold it for 4 seconds will reset the value.
When timer is running, in either display mode, press it will stop the
timer. In programming mode, press it will go to the next programming
value.

6. Up key: When timer is not running, in single/double dose display
mode, press it will increase the time setting value. When timer is
running, press it will stop the timer. In programming mode, press it will
go to the previous programming value.

7. RST key: Reset key. When timer is not running, press it will activate
the timer. When timer is running, press it will stop the timer.

8. LED digital display. In single/double dose display mode, the top
displays the actual time; the bottom displays the set value. In total
running time/cups modes, the top displays the accumulated running
time/cups; the bottom displays tot/CuPS. In programming mode, the
top displays setting parameters; the bottom displays programming

value.

4. Terminal Assignment

3. Front Panel

8

Figure 2. Terminal assignment

1
2

4567

Figure1. Front panel

1. Time range indicators: M for minutes, S for seconds. Both will be
illuminated when the time base is M:S(Minutes : Seconds)

2. Timer indicators: T1 is illuminated for single dose, T2 is
illuminated for double dose.

3. OUT indicator: illuminated when relay is on; turns off when relay
is off.

4. SET key. When timer is not running, in single/double dose
display mode, press it will shift between single dose time (T1) and
double dose time (T2)(see section 5.1 for details); press and hold it
for 3 seconds will shift between single/double dose display mode
and total running time/cups display mode(see section 5.1 for
details); press and hold it for 5 seconds will enter the parameter
programming menu(see section 5.2 for details).

3

Terminal functions when timer is running:
Manual(MAN),T2 (double dose time), T1(single dose time),

Common(COM).
Connecting MAN and COM: Timer starts running when they are
connected.
Connecting T2 and COM: Timer starts running for T2 when they are
disconnected .
Connecting T1 and COM: Timer starts running for T1 when they are

disconnected.

5. Programming

When timer is not running, press SET key for 5 seconds to enter the
programming menu. For each parameter setting, use up/down key to
select different programming values. Press SET key to confirm and
move on to next parameter. See figure 3 on next page for the
procedure. For the definition of each programming value, see
following section.

2012.11 P1/4

AUBER INSTRUMENTS WWW.AUBERINS.COM

JSL-72 Instruction Manual

tAdJ, Time adjust

On: When timer is not running, adjust timer directly by pressing up/
down key from the front panel
Off: Values for timer T1/T2 are locked.

dISP: Display mode

Tot: total time (unit: second).
CUPS: number of cups
*note 1: in Tot mode: total time will only display integer part; when
manual key is pressed and held, the running time is counted into total
time until the manual switch is released
*note 2: in CUPS mode: number of cups will not be counted into total
number when manual key is pressed
*note 3: press down key for 4 seconds will reset the display to zero in
both modes

tL A: constant A
tL b: constant b

These two constants are used for converting the total time display to
other units, such as weight in grams.

dISP= T x A/b

Where, T=T1 or T2. For example, if grinding 1 gram of coffee takes 2
seconds. Set A=1, b=2, will convert the total display unit from second
to gram.

6. Wiring Example

Please see figure 4 on next page for the wiring example.

Process Time
Set Time

0000

0000

trnG

s

TDIR

dn

tAdj

on

disp

Tot

Tl a

1

Tl b

1

SET

SET

SET

SET

SET

SET

3 seconds

SET

5 seconds

trnG
S

tdir
dn

tAdj
on

Disp
tot

tL A
1

tL b
1

0000

tot

0000

cups

Accumulated Value
Total Time

Accumulated Value
Total cups

Figure 3. Flow chart of programming

5. 1 How to Set the Timer and Dose Time T1/T2
When timer is not running, in single/double dose display mode,

a) press “SET” key to shift between single dose time T1 and double
dose time T2. When parameter “tAdJ” is programmed to “ON”(see
definition of “tAdJ” in next section), simply press up/ down key will
increase/decrease the set value of each delay time. (hold up/down
key will increase the changing speed exponentially).
b) hold “SET “ key for 3s, the display will change to total running time/
cups display mode. For how to program the two different display
modes, please see the definition of “dISP” in next section.
c) hold “SET” key for 5s, the display will enter parameter
programming menu

5.2 Definition of Programming Values:
trnG, Timer range

S：0.01s～99.99s；
M:S：1s～99m59s；

tdir , Timing direction

up：Counting up
dn：Counting down
*note: the timing direction can only be changed in the single and

double dose timer display. The manual control always count up so
that user can use its value to fine tune the single and double dose
setting.

2012.11 P2/4