diff --git a/hardware/cem-dt-885x/api.c b/hardware/cem-dt-885x/api.c
index 22e6c7a5..834e4290 100644
--- a/hardware/cem-dt-885x/api.c
+++ b/hardware/cem-dt-885x/api.c
@@ -34,6 +34,7 @@ static const int32_t hwcaps[] = {
 	SR_CONF_CONTINUOUS,
 	SR_CONF_DATALOG,
 	SR_CONF_SPL_WEIGHT_FREQ,
+	SR_CONF_SPL_WEIGHT_TIME,
 };
 
 static const char *weight_freq[] = {
@@ -41,6 +42,11 @@ static const char *weight_freq[] = {
 	"C",
 };
 
+static const char *weight_time[] = {
+	"F",
+	"S",
+};
+
 SR_PRIV struct sr_dev_driver cem_dt_885x_driver_info;
 static struct sr_dev_driver *di = &cem_dt_885x_driver_info;
 
@@ -187,6 +193,15 @@ static int config_get(int key, GVariant **data, const struct sr_dev_inst *sdi)
 		else
 			return SR_ERR;
 		break;
+	case SR_CONF_SPL_WEIGHT_TIME:
+		tmp = cem_dt_885x_weight_time_get(sdi);
+		if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_F)
+			*data = g_variant_new_string("F");
+		else if (tmp == SR_MQFLAG_SPL_TIME_WEIGHT_S)
+			*data = g_variant_new_string("S");
+		else
+			return SR_ERR;
+		break;
 	default:
 		return SR_ERR_NA;
 	}
@@ -236,6 +251,17 @@ static int config_set(int key, GVariant *data, const struct sr_dev_inst *sdi)
 		else
 			return SR_ERR_ARG;
 		break;
+	case SR_CONF_SPL_WEIGHT_TIME:
+		tmp_str = g_variant_get_string(data, NULL);
+		if (!strcmp(tmp_str, "F"))
+			ret = cem_dt_885x_weight_time_set(sdi,
+					SR_MQFLAG_SPL_TIME_WEIGHT_F);
+		else if (!strcmp(tmp_str, "S"))
+			ret = cem_dt_885x_weight_time_set(sdi,
+					SR_MQFLAG_SPL_TIME_WEIGHT_S);
+		else
+			return SR_ERR_ARG;
+		break;
 	default:
 		ret = SR_ERR_NA;
 	}
@@ -262,6 +288,9 @@ static int config_list(int key, GVariant **data, const struct sr_dev_inst *sdi)
 	case SR_CONF_SPL_WEIGHT_FREQ:
 		*data = g_variant_new_strv(weight_freq, ARRAY_SIZE(weight_freq));
 		break;
+	case SR_CONF_SPL_WEIGHT_TIME:
+		*data = g_variant_new_strv(weight_time, ARRAY_SIZE(weight_time));
+		break;
 	default:
 		return SR_ERR_NA;
 	}
diff --git a/hardware/cem-dt-885x/protocol.c b/hardware/cem-dt-885x/protocol.c
index c2def3e3..e9a92bc9 100644
--- a/hardware/cem-dt-885x/protocol.c
+++ b/hardware/cem-dt-885x/protocol.c
@@ -460,3 +460,66 @@ SR_PRIV int cem_dt_885x_weight_freq_set(const struct sr_dev_inst *sdi, int freqw
 
 	return ret;
 }
+
+SR_PRIV int cem_dt_885x_weight_time_get(const struct sr_dev_inst *sdi)
+{
+	struct dev_context *devc;
+	int cur_setting;
+	char tokens[5];
+
+	devc = sdi->priv;
+
+	cur_setting = devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
+	if (cur_setting == 0) {
+		/* Didn't pick up device state yet. */
+		tokens[0] = TOKEN_WEIGHT_TIME_FAST;
+		tokens[1] = TOKEN_WEIGHT_TIME_SLOW;
+		tokens[2] = -1;
+		if (wait_for_token(sdi, tokens, 0) != SR_OK)
+			return SR_ERR;
+		if (devc->token == TOKEN_WEIGHT_TIME_FAST)
+			return SR_MQFLAG_SPL_TIME_WEIGHT_F;
+		else
+			return SR_MQFLAG_SPL_TIME_WEIGHT_S;
+	} else
+		return cur_setting;
+
+}
+
+SR_PRIV int cem_dt_885x_weight_time_set(const struct sr_dev_inst *sdi, int timew)
+{
+	struct dev_context *devc;
+	int cur_setting, ret;
+	char tokens[5];
+
+	devc = sdi->priv;
+
+	cur_setting = devc->cur_mqflags & (SR_MQFLAG_SPL_TIME_WEIGHT_F | SR_MQFLAG_SPL_TIME_WEIGHT_S);
+	if (cur_setting == timew)
+		/* Already set to this time weighting. */
+		return SR_OK;
+
+	/* The toggle below needs the desired state in first position. */
+	if (timew == SR_MQFLAG_SPL_TIME_WEIGHT_F) {
+		tokens[0] = TOKEN_WEIGHT_TIME_FAST;
+		tokens[1] = TOKEN_WEIGHT_TIME_SLOW;
+	} else {
+		tokens[0] = TOKEN_WEIGHT_TIME_SLOW;
+		tokens[1] = TOKEN_WEIGHT_TIME_FAST;
+	}
+	tokens[2] = -1;
+
+	if (cur_setting == 0) {
+		/* Didn't pick up device state yet. */
+		if (wait_for_token(sdi, tokens, 0) != SR_OK)
+			return SR_ERR;
+		if (devc->token == tokens[0])
+			/* Nothing to do. */
+			return SR_OK;
+	}
+
+	/* 51ms timeout seems to work best for this. */
+	ret = cem_dt_885x_toggle(sdi, CMD_TOGGLE_WEIGHT_TIME, tokens, 51);
+
+	return ret;
+}
diff --git a/hardware/cem-dt-885x/protocol.h b/hardware/cem-dt-885x/protocol.h
index 7bf6ea8e..a2e77e75 100644
--- a/hardware/cem-dt-885x/protocol.h
+++ b/hardware/cem-dt-885x/protocol.h
@@ -69,6 +69,7 @@ enum {
 enum {
 	CMD_TOGGLE_RECORDING = 0x55,
 	CMD_TOGGLE_WEIGHT_FREQ = 0x99,
+	CMD_TOGGLE_WEIGHT_TIME = 0x77,
 };
 
 /** Private, per-device-instance driver context. */
@@ -107,5 +108,7 @@ SR_PRIV int cem_dt_885x_recording_set(const struct sr_dev_inst *sdi, gboolean st
 SR_PRIV gboolean cem_dt_885x_recording_get(const struct sr_dev_inst *sdi);
 SR_PRIV int cem_dt_885x_weight_freq_get(const struct sr_dev_inst *sdi);
 SR_PRIV int cem_dt_885x_weight_freq_set(const struct sr_dev_inst *sdi, int freqw);
+SR_PRIV int cem_dt_885x_weight_time_get(const struct sr_dev_inst *sdi);
+SR_PRIV int cem_dt_885x_weight_time_set(const struct sr_dev_inst *sdi, int timew);
 
 #endif